Comparative Examination Of Tomographic And Biometric Parameters In Keratoconus Patients With Scheimpflug Camera, Swept-Source Oct And Optical Biometry Devices
Published 2024 - 42nd Congress of the ESCRS
Reference: PP05.06 | Type: Poster | DOI: 10.82333/xxn9-dg70
Authors: Ozlem Ozkan* 1 , Canan Aslı Utine 2
1Ophthalmology,Dokuz Eylul University,Izmir,Türkiye, 2Ophthalmology,Dokuz Eylul University,Izmir,Türkiye;İzmir Biomedicine and Genome Center,Izmir,Türkiye
Purpose
To comparatively evaluate tomographic and biometric parameters in eyes with keratoconus with Scheimpflug camera, optical and swept-source OCT biometry devices.
Setting
Dokuz Eylül University, Ophthalmology Clinic
Methods
In 48 eyes (23 bilateral) of 25 patients diagnosed with KCN, best-corrected visual acuity (BCVA), refraction, tomography and biometry examinations were performed; i.e., keratometry (K1, K2, Kmean), anterior chamber depth (ACD), central corneal thickness (CCT) and target intraocular lens (IOL) diopters (D) with Pentacam (Oculus, Germany) tomography, IOLMaster 500 (Carl Zeiss Meditec AG, Germany) and Argos (Alcon, USA) biometry devices.
Results
Mean age was 27.31±10.85,BCVA was 0.22±0.44LogMAR.According to Pentacam; 9(18.8%),22(45.8%),13(27.1%) and 4(8.3%) of total eyes were stage 1, 2, 3 and 4 KCN, respectively.CCT was significantly thinner in Pentacam(441.39±54.23µm) than Argos(471.50±93.72µm)(p=0.01);ACD was measured to be significantly shallower with Pentacam(3.40±0.44mm) than with Argos(3.86±0.71mm)(p<0.01).There were no significant differences between the target IOL D delivered by Argos and IOLMaster(p>0.5).SA60AT and MA60AC IOL D provided by Argos and IOLMaster showed high comparability at all mean values(Bland-Altmann analysis,p=0.23,p=0.194).The KCN stage was correlated with Pentacam K1, K2,astigmatism and Argos K1,K2.It was inversely correlated with Pentacam CCT(p<0.05).
Conclusions
Intraocular lens D calculated by IOLMaster and Argos devices showed high compliance across all values. However, as the KCN stage increases, the difference between Pentacam and Argos and IOLMaster measurements seem to increase.